Influence

The U.S. Chamber of Commerce is the top non-disclosing spender in 15 congressional races, according to a new analysis by a pair of advocacy groups.

Public Citizen's Chamber Watch and the Main Street Alliance examined the Chamber's spending in 35 House and Senate races using data from the Center for Responsive Politics. They found that as of Oct. 31, the Republican-leaning organization has spent $31.87 million in outside money on congressional contests.

The Chamber is playing ball in the most expensive Senate races in the country. As of Oct. 31, the chamber has poured $4.4 million into Virginia's Senate race, $4.3 million into Ohio's, $2.85 million into Wisconsin's contest and $3.85 million into Florida's race.

Here's the breakdown of the chamber's spending in races where's its spent more than $100,000:

-- Among Senate races, the Chamber is the top spender in Florida, New Mexico, Hawaii, Missouri and Connecticut.